Acuvim II AXM-RS485 2nd RS485 Communication Module Accessory by Accuenergy

Description

The AXM-RS485 module uses RS485 serial communication and the Modbus-RTU protocol, just like the on-board RS485 port of the Acuvim II series meter

• It provides a second RS485 port for serial communication, and it can work with the on-board RS485 serial communication simultaneously
• The terminals of communication are generally A, B, and S, where A is for the differential signal +, B is for the differential signal -, and S is connected to the shield of the twisted pair cables
• Up to 32 devices can be connected on an RS485 bus without repeaters
• Use good quality shielded twisted pair cable, AWG22 (0.5mm) or higher
• The overall length of the RS485 cable connecting all devices should not exceed 1200m (4000ft)
• Every A(+) should be connected to A(+), B(-) to B(-). Otherwise, it will influence the network or even damage the communication interface
• When using a long communication cable to connect several devices, an anti-signal reflecting resistor (typical value 120Ω-300Ω/0.25W) is normally added  to the end of the cable beside the last meter to prevent communication quality degradation

Accuenergy AXM I/O Support Modules are designed for use with the Acuvim II, Acuvim IIR, Acuvim IIW power meters

• They add various Input and Output ports
• -IO1
  • Digital Inputs (Dry): 6
  • Relay Outputs: 2
  • Power Supply: 24Vdc
• -IO2
  • Digital Inputs (Dry): 4
  • Digital Outputs: 2
  • Analog Outputs: 2
• -IO3
  • Digital Inputs (Dry): 4
  • Analog Inputs: 2
  • Relay Outputs: 2

Accuenergy AXM Pluggable Communication Modules are designed for use with the Acuvim II, Acuvim IIR, Acuvim IIW power meters